QualityParts From Oregon That you can depend on. Spindle Assembly: Fits IS-1000Z, IS-300Z and IS-4000Z Hydrowalk DDS Series; Fits Simplicity ZT2148 and ZT2350 models; Use with OregonĀ® 45-220 bearings; ; ; Oregon Equipment Parts 82-350 Spindle Assy Ferris[813]